using System.Collections.Generic;
using NUnit.Framework;

namespace Drill.Core.Utilities
{
    [TestFixture]
    public class StringToInt32ConverterTests
    {
        [Category("UnitTest")]
        [Test]
        [TestCaseSource("TestCasesForCanConvert")]
        public int CanConvert(string value, int defaultValue)
        {
            int result = StringToInt32Converter.Convert(value, defaultValue);
            return result;
        }

        public static IEnumerable<TestCaseData> TestCasesForCanConvert
        {
            get
            {
                yield return new TestCaseData(null, 0).Returns(0);
                yield return new TestCaseData(null, 1).Returns(1);
                yield return new TestCaseData("", 0).Returns(0);
                yield return new TestCaseData("", 1).Returns(1);
                yield return new TestCaseData(" ", 0).Returns(0);
                yield return new TestCaseData(" ", 1).Returns(1);
                yield return new TestCaseData("a", 1).Returns(1);
                yield return new TestCaseData("b", 1).Returns(1);
                yield return new TestCaseData("c", 1).Returns(1);
                yield return new TestCaseData("d", 1).Returns(1);
                yield return new TestCaseData(" a", 1).Returns(1);
                yield return new TestCaseData(" b", 1).Returns(1);
                yield return new TestCaseData(" c", 1).Returns(1);
                yield return new TestCaseData(" d", 1).Returns(1);
                yield return new TestCaseData("a ", 1).Returns(1);
                yield return new TestCaseData("b ", 1).Returns(1);
                yield return new TestCaseData("c ", 1).Returns(1);
                yield return new TestCaseData("d ", 1).Returns(1);
                yield return new TestCaseData(" a ", 1).Returns(1);
                yield return new TestCaseData(" b ", 1).Returns(1);
                yield return new TestCaseData(" c ", 1).Returns(1);
                yield return new TestCaseData(" d ", 1).Returns(1);

                yield return new TestCaseData("-1", 0).Returns(-1);
                yield return new TestCaseData("-2", 0).Returns(-2);
                yield return new TestCaseData("-3", 0).Returns(-3);
                yield return new TestCaseData("0", 1).Returns(0);
                yield return new TestCaseData("1", 0).Returns(1);
                yield return new TestCaseData("2", 0).Returns(2);
                yield return new TestCaseData("3", 0).Returns(3);
            }
        }
    }
}